Large High Pressure Centrifugal Compressors For Oxygen Service

Abstract

Centrifugal compressors have been used to compress oxygen for at least 25 years. Until ten years ago, the flows were relatively small and discharge pressures were relatively low. In the mid 1960's the size of single train oxygen plants increased dramatically, and this allowed discharge pressures from the centrifugal machine in the 28 to 41 bar range. Change in the design and installation of centrifugal oxygen compressors evolved in the late 1960's as a result of the increase in both size and discharge pressure. It also made consideration of 69 bar discharges possible after experience was gained with the 41 bar discharge level. The rapid change in the state of the art of application of centrifugal compressors to oxygen service in conjunction with the known hazards of the gas has prompted this discourse. Consideration will be given to the application including safety features, materials of construction, cleanliness required, desirable installation and maintenance features and the present and projected design limits for these centrifugal compressors.